关键词: 功能安全评估，工艺安全管理，独立保护层，SIL评估，失效模式及影响分析, functional safety assessment(FSA)， Process safety management， IPL，Safety Integrity Level(SIL) assessment， failure mode and impact analysis.

Abstract: Safety Instrumented Systems(SIS) and other independent protective layers, such as process control loops, alarms, and safety relief systems, are key safety facilities for controlling major process safety events. High-quality functional safety assessment and effective functional safety management activities can effectively curb major accidents and improve process safety management. This paper summarizes various typical management issues in functional safety management, Such as pay attention to the design, construction, hardware, SIS, neglect the assessment, management, personnel capabilities, other independent layers of protection. And put forward solutions to the problem, especially to strengthen personnel capacity training and system construction, improve process safety information management, accumulate failure data, attach importance to the management of other independent protection layers(IPL), establish management indicators of safety instrument systems and IPL, and carry out Periodic functional safety audit and assessment.